Add custom interstitial for captive portals.

chrome/browser/ssl/ssl_blocking_page.cc

Index: chrome/browser/ssl/ssl_blocking_page.cc
diff --git a/chrome/browser/ssl/ssl_blocking_page.cc b/chrome/browser/ssl/ssl_blocking_page.cc
index 944dae4b3b88cb8f5f4a15b655217cd74524cc4a..1f70870eec29ececf3ac13cf8c8fe8fd1bb5338d 100644
--- a/chrome/browser/ssl/ssl_blocking_page.cc
+++ b/chrome/browser/ssl/ssl_blocking_page.cc
@@ -331,8 +331,7 @@ SSLBlockingPage::SSLBlockingPage(content::WebContents* web_contents,
       callback_(callback),
       cert_error_(cert_error),
       ssl_info_(ssl_info),
-      overridable_(options_mask & OVERRIDABLE &&
-                   !(options_mask & STRICT_ENFORCEMENT)),
+      overridable_(IsOptionsOverridable(options_mask)),
       danger_overridable_(true),
       strict_enforcement_((options_mask & STRICT_ENFORCEMENT) != 0),
       internal_(false),
@@ -721,6 +720,12 @@ void SSLBlockingPage::SetExtraInfo(
   }
 }
 
+// static
+bool SSLBlockingPage::IsOptionsOverridable(int options_mask) {
+  return (options_mask & SSLBlockingPage::OVERRIDABLE) &&
+         !(options_mask & SSLBlockingPage::STRICT_ENFORCEMENT);
+}
+
 void SSLBlockingPage::OnGotHistoryCount(bool success,
                                         int num_visits,
                                         base::Time first_visit) {